@Override
public void runActivity(@NotNull Project project) {
    if (!ApplicationManager.getApplication().isHeadlessEnvironment()) {
        final EditorEventMulticaster eventMulticaster = EditorFactory.getInstance().getEventMulticaster();
        final PsiDocumentManager psiDocumentManager = PsiDocumentManager.getInstance(project);
        eventMulticaster.addCaretListener(new CaretListener() {
            @Override
            public void caretPositionChanged(CaretEvent e) {
                final PsiFile psiFile = psiDocumentManager.getPsiFile(e.getEditor().getDocument());
                if (psiFile instanceof GraphQLFile) {
                    int offset = e.getEditor().logicalPositionToOffset(e.getNewPosition());
                    psiFile.putUserData(CARET_OFFSET, offset);
                }
            }
        }, project);
    }
}
 

public WidgetIndentsHighlightingPassFactory(@NotNull Project project) {
  this.project = project;
  flutterDartAnalysisService = FlutterDartAnalysisServer.getInstance(project);
  this.editorOutlineService = ActiveEditorsOutlineService.getInstance(project);
  this.inspectorGroupManagerService = InspectorGroupManagerService.getInstance(project);
  this.editorEventService = EditorMouseEventService.getInstance(project);
  this.editorPositionService = EditorPositionService.getInstance(project);
  this.settingsListener = new SettingsListener();
  this.outlineListener = this::updateEditor;

  TextEditorHighlightingPassRegistrar.getInstance(project)
    .registerTextEditorHighlightingPass(this, TextEditorHighlightingPassRegistrar.Anchor.AFTER, Pass.UPDATE_FOLDING, false, false);

  syncSettings(FlutterSettings.getInstance());
  FlutterSettings.getInstance().addListener(settingsListener);

  final EditorEventMulticaster eventMulticaster = EditorFactory.getInstance().getEventMulticaster();
  eventMulticaster.addCaretListener(new CaretListener() {
    @Override
    public void caretPositionChanged(@NotNull CaretEvent event) {
      final Editor editor = event.getEditor();
      if (editor.getProject() != project) return;
      if (editor.isDisposed() || project.isDisposed()) return;
      if (!(editor instanceof EditorEx)) return;
      final EditorEx editorEx = (EditorEx)editor;
      WidgetIndentsHighlightingPass.onCaretPositionChanged(editorEx, event.getCaret());
    }
  }, this);
  editorOutlineService.addListener(outlineListener);
}
 

public WidgetIndentsHighlightingPassFactory(@NotNull Project project) {
  this.project = project;
  flutterDartAnalysisService = FlutterDartAnalysisServer.getInstance(project);
  this.editorOutlineService = ActiveEditorsOutlineService.getInstance(project);
  this.inspectorGroupManagerService = InspectorGroupManagerService.getInstance(project);
  this.editorEventService = EditorMouseEventService.getInstance(project);
  this.editorPositionService = EditorPositionService.getInstance(project);
  this.settingsListener = new SettingsListener();
  this.outlineListener = this::updateEditor;

  TextEditorHighlightingPassRegistrar.getInstance(project)
    .registerTextEditorHighlightingPass(this, TextEditorHighlightingPassRegistrar.Anchor.AFTER, Pass.UPDATE_FOLDING, false, false);

  syncSettings(FlutterSettings.getInstance());
  FlutterSettings.getInstance().addListener(settingsListener);

  final EditorEventMulticaster eventMulticaster = EditorFactory.getInstance().getEventMulticaster();
  eventMulticaster.addCaretListener(new CaretListener() {
    @Override
    public void caretPositionChanged(@NotNull CaretEvent event) {
      final Editor editor = event.getEditor();
      if (editor.getProject() != project) return;
      if (editor.isDisposed() || project.isDisposed()) return;
      if (!(editor instanceof EditorEx)) return;
      final EditorEx editorEx = (EditorEx)editor;
      WidgetIndentsHighlightingPass.onCaretPositionChanged(editorEx, event.getCaret());
    }
  }, this);
  editorOutlineService.addListener(outlineListener);
}
 

public void addClickNavigator(final Editor view,
                              final SyntaxHighlighter highlighter,
                              final HighlightData[] data,
                              final boolean isBackgroundImportant) {
  addMouseMotionListener(view, highlighter, data, isBackgroundImportant);

  CaretListener listener = new CaretAdapter() {
    @Override
    public void caretPositionChanged(CaretEvent e) {
      navigate(view, true, e.getNewPosition(), highlighter, data, isBackgroundImportant);
    }
  };
  view.getCaretModel().addCaretListener(listener);
}
 

@Override
public void addCaretListener(@Nonnull final CaretListener listener) {
  CaretListener wrapper = new CaretListener() {
    @Override
    public void caretPositionChanged(@Nonnull CaretEvent e) {
      if (!myEditorWindow.getDocument().isValid()) return; // injected document can be destroyed by now
      Caret caret = e.getCaret();
      assert caret != null;
      CaretEvent event = new CaretEvent(createInjectedCaret(caret), myEditorWindow.hostToInjected(e.getOldPosition()), myEditorWindow.hostToInjected(e.getNewPosition()));
      listener.caretPositionChanged(event);
    }
  };
  myCaretListeners.registerWrapper(listener, wrapper);
  myDelegate.addCaretListener(wrapper);
}
 

@Override
public void removeCaretListener(@Nonnull final CaretListener listener) {
  CaretListener wrapper = myCaretListeners.removeWrapper(listener);
  if (wrapper != null) {
    myDelegate.removeCaretListener(wrapper);
  }
}
 

/**
 * Highlights the operation, if any, that wraps the current caret position.
 * Fragments used from the operation are highlighted recursively.
 */
@Override
public boolean analyze(final @NotNull PsiFile file, boolean updateWholeFile, @NotNull HighlightInfoHolder holder, @NotNull Runnable action) {

    // run the default pass first (DefaultHighlightVisitor) which calls annotators etc.
    action.run();

    final PsiElement operationAtCursor = getOperationAtCursor(file);
    if (operationAtCursor != null && hasMultipleVisibleTopLevelElement(file)) {

        // store the range of the current operation for use in the caret listener
        file.putUserData(QUERY_OPERATION_TEXT_RANGE, operationAtCursor.getTextRange());

        final Color borderColor = EditorColorsManager.getInstance().getGlobalScheme().getColor(EditorColors.TEARLINE_COLOR);
        final TextAttributes textAttributes = new TextAttributes(null, null, borderColor, EffectType.ROUNDED_BOX, Font.PLAIN);
        final Map<String, GraphQLFragmentDefinition> foundFragments = Maps.newHashMap();
        findFragmentsInsideOperation(operationAtCursor, foundFragments, null);
        for (PsiElement psiElement : file.getChildren()) {
            boolean showAsUsed = false;
            if (psiElement instanceof GraphQLFragmentDefinition) {
                GraphQLFragmentDefinition definition = (GraphQLFragmentDefinition) psiElement;
                if (definition.getOriginalElement() instanceof GraphQLFragmentDefinition) {
                    // use the original PSI to compare since a separate editor tab has its own version of the PSI
                    definition = (GraphQLFragmentDefinition) definition.getOriginalElement();
                }
                showAsUsed = foundFragments.containsKey(getFragmentKey(definition));
            } else if (psiElement == operationAtCursor) {
                showAsUsed = true;
            }
            if (showAsUsed) {
                final TextRange range = psiElement.getTextRange();
                final Annotation annotation = new Annotation(range.getStartOffset(), range.getEndOffset(), HighlightSeverity.INFORMATION, ELEMENT_INCLUDED_MESSAGE, null);
                annotation.setEnforcedTextAttributes(textAttributes);
                holder.add(HighlightInfo.fromAnnotation(annotation));
            }
        }

    } else {
        file.putUserData(QUERY_OPERATION_TEXT_RANGE, null);
    }


    // find the editor that was highlighted and listen for caret changes to update the active operation
    UIUtil.invokeLaterIfNeeded(() -> {
        final FileEditor fileEditor = FileEditorManager.getInstance(file.getProject()).getSelectedEditor(file.getVirtualFile());
        if (fileEditor instanceof TextEditor) {
            final Editor editor = ((TextEditor) fileEditor).getEditor();
            if (!Boolean.TRUE.equals(editor.getUserData(QUERY_HIGHLIGHT_LISTENER_ADDED))) {
                editor.getCaretModel().addCaretListener(new CaretListener() {
                    @Override
                    public void caretPositionChanged(CaretEvent e) {
                        // re-highlight when the operation changes

                        final Editor currentEditor = e.getEditor();
                        final Project project = currentEditor.getProject();
                        if (project != null) {

                            final PsiFile psiFile = PsiDocumentManager.getInstance(project).getPsiFile(currentEditor.getDocument());
                            if (psiFile != null) {

                                final TextRange previousOperationRange = psiFile.getUserData(QUERY_OPERATION_TEXT_RANGE);
                                psiFile.putUserData(QUERY_FROM_SELECTION, currentEditor.getSelectionModel().hasSelection());

                                boolean sameOperation = false;
                                boolean hadOperation = (previousOperationRange != null);
                                if (hadOperation) {
                                    // check if we're still inside the range of the previously highlighted op
                                    final int newOffset = currentEditor.logicalPositionToOffset(e.getNewPosition());
                                    sameOperation = previousOperationRange.contains(newOffset);
                                    if (sameOperation && !Boolean.TRUE.equals(psiFile.getUserData(QUERY_FROM_SELECTION))) {
                                        // still the same op, and we didn't select text before, so no need to proceed
                                        return;
                                    }
                                }

                                // remove existing unused query text range highlights
                                removeHighlights(currentEditor, project);

                                if (!sameOperation) {
                                    // moved to somewhere outside the previous operation
                                    if (hadOperation || getOperationAtCursor(psiFile) != null) {
                                        // perform a new highlighting pass
                                        DaemonCodeAnalyzer.getInstance(project).restart(psiFile);
                                    }
                                }
                            }
                        }
                    }
                });
                // finally indicate we've added the listener
                editor.putUserData(QUERY_HIGHLIGHT_LISTENER_ADDED, true);
            }
        }
    });

    return true;
}
 

@Override
public void addCaretListener(@Nonnull final CaretListener listener) {
  throw new UnsupportedOperationException("Not implemented");
}
 

@Override
public void removeCaretListener(@Nonnull final CaretListener listener) {
  throw new UnsupportedOperationException("Not implemented");
}
 

@Override
public void addCaretListener(@Nonnull final CaretListener listener) {
  myCaretListeners.addListener(listener);
}
 

@Override
public void removeCaretListener(@Nonnull CaretListener listener) {
  myCaretListeners.removeListener(listener);
}
 

public void disposeModel() {
  for (CaretListener wrapper : myCaretListeners.wrappers()) {
    myDelegate.removeCaretListener(wrapper);
  }
  myCaretListeners.clear();
}
 

/**
 * Adds a listener for receiving notifications about caret movement and caret addition/removal
 *
 * @param listener the listener instance.
 */
void addCaretListener(@Nonnull CaretListener listener);
 

/**
 * Adds a listener for receiving notifications about caret movement and caret addition/removal.
 * The listener is removed when the given parent disposable is disposed.
 *
 * @param listener the listener instance.
 */
default void addCaretListener(@Nonnull CaretListener listener, @Nonnull Disposable parentDisposable) {
  addCaretListener(listener);
  Disposer.register(parentDisposable, () -> removeCaretListener(listener));
}
 

/**
 * Removes a listener for receiving notifications about caret movement and caret addition/removal
 *
 * @param listener the listener instance.
 */
void removeCaretListener(@Nonnull CaretListener listener);
 

@Override
public void addCaretListener(@Nonnull CaretListener listener) {

}
 

@Override
public void removeCaretListener(@Nonnull CaretListener listener) {

}